Internal-combustion engine



Jan. 8, 1929. 1,698,060

. A. MOORHOUSE INTERNAL COMBUSTION ENGINE Filed Sept. 25, 1925 gwoanto c llliiii Patented Jan. 8, 1929.

ALFRED MOORHOUSE, OF DETROIT, MICI'LTGAN, ASSEGNOR TO PACKARD MQTOR CAR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

nvrnannri-oonnns'rron ENGINE.

Application filed September 25, 1925." Seria1No.58,478.,

This invention relates to internal coinbustion engines and particularly to the valve mechanism thereof.

During the past few years the top speed of automobile engines has been increased from time to time, and as the speed has gone up it has been necessary to increase the spring tension on the poppet valvesin order to insure the closing of the valves atthe higher speeds. In some cases the ability of the springs to close the valves is the thing that determines the limit of speed, and consequently some attention has been given to simplify the valve mechanism of aninternal combustion engine.

Another ob ect of the inventlon is to provide fewer parts in the valve 'adpisting mechanism to thereby simplify the construc- I tion and reduce the costs.

Other objects of the invention will appear from the following description taken in connection with the drawings, which form a part of this specification, and in which:

Fig. 1 is a sectional View through a portion of an internal combustion engine embodying the invention;

Fig. 2 is a transverse view on the line IIII of Fig. 1,'and

Fig. 3 is a perspective view of the adjust ing disk and its supporting means and cooperating parts.

Referring to the drawings, 10 represents the crank case of an internal combustion engine and 11 is a portion ofthe cylinder block in which there is a valve port 12 and a poppet valve 13 to close the port. A valve guide 14 is arranged in the cylinder block and the stem 15 of the valve 13 extends through the valve guide 1 1 as shown in the drawing. At the lower end of the valve stem there is a key 16 which extends through a transverse opening in the valve stem, and

this key forms an abutment for the lower a recess 19 into which the key fits when in place. The upper endof the valve spring 17 abuts against the part of the cylinder 1 block surrounding the valve stem as at 20. Thus the valve isretained in closed position.

In thecrank case there is a cam shaft 21 rotated through suitable timing gearsin the crank case (not shown) and a rocker arm 22 is supported on a pivot as at 23 in a suitable bearing in the crank case. The

rocker arm 22 operates against a tappet or valve operating pin 24 which is arranged in guide 25 in thecrank case 10 immediately beneath and in axial alinement" with the stem15 of the valve above described. In order thatthe valve tappet 24 may be replacement when .being assembled, it is formed with a groove 26 and provided with a split rmg 27 in the groove. This ring is "tained in its guide against accidental disarranged somewhat above the guide 25 when the 'tappetis in its lowest operative position so that it does not interfere with the operation of the tappet and yet it will pre vent the tappet from dropping down into the crank case as when the'rocker arm 22 is removed for replacement or repair. The upper endv of the valve tappet 24 i arranged in close proximitywith the lower end of the valve stem 15, and since it is impracticable to make these parts so that they will exactly meet, a'metal disk 28 is provided between the valve stem and the valve tappet. The assembler will have several of these disks of varying thicknesses and with the engine running or with the other parts in spring ring 29 does not extend all the way around the disk 28 but is open at one side so that the disk may be grasped by a pair of pliers or other tools and removed and another disk replaced. At-no place is the spring ring 29 in contact with either the valve stem or the tappet 24 so that there is no wear between those parts and no likelihood of the tappet catching on the spring vseen particularly in Figs. 2 and 3. The

the spring ring. 29 retains the disk 28 in place but is spaced from the valve stem and push rod so that it does not interfere with;

the action of either. i

All of the parts forming. the. adjusting means are light and there are fewer of them than in the conventional threaded adjusting means, so that the mechanism may be easily and cheaply manufactured and accurately produced Since there is no threading of the tappet 24, this part may be made much smaller in diameter and'easily ground to an exact fit in its guide 25. This makes this part lighter and a better -tit in its bushing. The entire mechanism is so much lighter than the conventional construction that a spring or much: less tension may be used for the'same engine or the same spring may be used. and higher speeds developed.

Vhile I have herein-describedv in some detail a specific embodiment of my'invention, which I deem to be new and advantageous and may specifically claim, I do not desire it to be understood that my invention is limited to the exact details of the construct-iona, asit will be apparent that changes may be made therein without departing from the spirit. or scope of myinvention.

Having. thus described my invention, what 7 claim and. desire to secure by Letters Patent 1s 1. In aninternal combustion engine, the

combination with the valve stem and the tappet therefor, of a disk arranged between the valve stem and the tappet, and an arcuate spring carried by the. valve stem, said spring partially surrounding the disk and spaced from the. valve stem and tappet.

'2. Inan engine, the combination of a valve stem, a tappet therefor, a key in one or said parts, a disk. arranged between the' valve stem'and the tappet, and means carried by.

the. key'for retaining the disk. in place.

3. In an internalcombustion engine, the combination of; a poppet valve,- a spring for closing said valve, an abutment on the valve for one end of said. spring, a key in the valve stem for supporting said abutment, a disk between the valve stem and tappet, and meanson said key for supporting the disk, 4. In an engine, the combination of a valve and a tappet, 'a disk arranged between the valve and tappet, and'an arcuate spring partly surrounding the disk, and means connecting the arcuate spring with the valve stem.

5. In an engine, the combination of a poppet valve, a spring for closing the valve, a .key extending through the stem .of the valve and forming an abutment for the spring, a disk at the end of the valve stem, and a spring carried by said key partially surrounding and retaining said disk in position. y

6. In an engine, the combination of a valve, a tappet therefor, a disk between the valve and tappet, a key in the valve stern, said key having an extension, a springpartially surrounding said disk and retaining ;i

it in place, and means integrally connecting said spring to said extension.

7. In an internal combustion engine, the combination with the valve and the tappet therefor, of a disc arranged between the valve and the tappet, a spring for closing said valve, an abutment on the valve for one end of the spring, a key inthe valve stem providing a seatforsaid abutment, an arm on said key and an arcuate spring support by said arm adapted to retain said disc in position.

8. In combination withthe valve and the tappet therefor, of a disc arranged between the valve and tappet, a spring for the valve, an abutment on the valve stem for one end of the spring, said abutment having a recess, a key insaid valve fitting said" recess,.anarm upon said key and .arcuate spring sections upon said arm for supporting the said discs. In testnnony whereof Iaifix mysignature.

ALFRED oonnonsn an internal combustion engine the 

